NGC 3561

Galaxie
NGC 3561/A
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Aufnahme mithilfe des Hubble-Weltraumteleskops
AladinLite
SternbildGroßer Bär
Position
Äquinoktium: J2000.0, Epoche: J2000.0
Rektaszension11h 11m 13,2s [1][2]
Deklination+28° 41′ 47″ [1][2]
Erscheinungsbild
Morphologischer TypS0^0^: pec/Sy3 (NGC 3561)
SA(r)a pec (NGC 3561A)[3]
Helligkeit (visuell)13,8 (NGC 3561)
13,4 (NGC 3561A) mag[3]
Helligkeit (B-Band)14,7 (NGC 3561)
14,3 (NGC 3561A) mag[3]
Winkel­ausdehnung0,8 × 0,8' (NGC 3561)
0,9' × 0,9' (NGC 3561A)[3]
Positionswinkel[3]
Inklination°
Flächen­helligkeit13,2 (NGC 3561)
13,1 (NGC 3561A) mag/arcmin²[3]
Physikalische Daten
ZugehörigkeitAbell 1185
Rotverschiebung0,029367 ± 0,000033[1]
0,029356 ± 0,000022[2]
Radial­geschwin­digkeit(8804 ± 10) km/s[1]
(8801 ± 7) km/s[2]
Hubbledistanz
H0 = 73 km/(s • Mpc)		(392 ± 27)e6 Lj
(120,2 ± 8,4) Mpc [1]
Absolute Helligkeitmag
MasseM☉
DurchmesserLj
Metallizität [Fe/H]{{{Metallizität}}}
Geschichte
EntdeckungJohn Herschel
Entdeckungsdatum30. März 1827
Katalogbezeichnungen
NGC 3561/A • UGC 6224 • PGC 33991/2 • CGCG 155-090/156-011 • MCG +5-27-10/11 • IRAS 11085+2859 • Arp 105 • VV 237 • GC 2326 • h 835 • LDCE 0784 NED002/3

NGC 3561 ist eine linsenförmige Galaxie im Sternbild Ursa Major. Die Galaxie interagiert mit der Spiralgalaxie NGC 3561A und bildet das Galaxienpaar Arp 105. Das System ist etwa 392 Mio. Lichtjahre von der Milchstraße entfernt. Halton Arp gliederte seinen Katalog ungewöhnlicher Galaxien nach rein morphologischen Kriterien in Gruppen. Diese Galaxie gehört zu der Klasse Elliptischer Galaxien mit Verbindung zu Spiralen (Arp-Katalog).

Das Objekt wurde am 30. März 1827 von John Herschel entdeckt.[4]

  • Aufnahme eines größeren Bereichs
    Aufnahme eines größeren Bereichs

Literatur

  • Jeff Kanipe und Dennis Webb: The Arp Atlas of Peculiar Galaxies – A Chronicle and Observer´s Guide, Richmond 2006, ISBN 978-0-943396-76-7
Commons: NGC 3561 – Sammlung von Bildern, Videos und Audiodateien

Einzelnachweise

  1. ↑ a b c d NASA/IPAC EXTRAGALACTIC DATABASE NGC 3561
  2. ↑ a b NASA/IPAC EXTRAGALACTIC DATABASE NGC 3561A
  3. ↑ a b c d e f SEDS: NGC 3561
  4. ↑ Seligman

Auf dieser Seite verwendete Medien

NGC 3561 (Arp 105) within galaxy cluster Abell 1185 - N3561s.jpg
Autor/Urheber: Credit Line and Copyright Adam Block/Mount Lemmon SkyCenter/University of Arizona, Lizenz: CC BY-SA 3.0 us
NGC 3561 (Arp 105) within galaxy cluster Abell 1185


Picture Details: 

   Optics            Schulman 0.8m Telescope (RCOS)
   Camera            SBIG STX 16803
   Filters           AstroDon Generation II
   Dates             Spring 2018
   Location          Mount Lemmon SkyCenter
   Exposure          LRGB = 11 : 5 : 5 : 5 Hours
   Acquisition       Astronomy Control Panel (DC3 Dreams), Maxim DL (Cyanogen), FlatMan XL (Alnitak)
   Processing        PixInsight
   Credit Line and Copyright        
                     Adam Block/Mount Lemmon SkyCenter/University of Arizona
.
Hubble Arp105 WFC3 mstr flat cont FINAL2.jpg
Arp 105 is a dazzling ongoing merger between an elliptical galaxy and a spiral galaxy drawn together by gravity, characterized by a long, drawn out tidal tail of stars and gas more than 362,000 light-years long. The immense tail, which extends beyond this image from NASA’s Hubble Space Telescope, was pulled from the two galaxies by their gravitational interactions and is embedded with star clusters and dwarf galaxies. The distinctively shaped arrangement of galaxies and tail gives the grouping its nickname: The Guitar.

The gravitational dance between elliptical galaxy NGC 3561B and spiral galaxy NGC 3561A creates a wealth of fascinating colliding galaxy features. A long lane of dark dust emerging from the elliptical galaxy ends in, and may be feeding, a bright blue area of star formation on the base of the guitar known as Ambartsumian’s Knot. Ambartsumian’s Knot is a tidal dwarf galaxy, a type of star-forming system that develops from the debris in tidal arms of interacting galaxies.

Two more bright blue areas of star formation are obvious in the Hubble image at the edges of the distorted spiral galaxy. The region to the left in the spiral galaxy is likely very similar to Ambartsumian’s Knot, a knot of intense star formation triggered by the merger. The region to the right is still under investigation ― it could be part of the collision, but its velocity and spectral data (indicating distance) are different from the rest of the system, so it may be a foreground galaxy.

Thin, faint tendrils of gas and dust are just barely visible stretching between and connecting the two galaxies. These tendrils are particularly interesting to astronomers since they may help define the timescale of the evolution of this collision.

A multitude of more-distant background galaxies are visible around and even through this merging duo. The bright blue blob of stars to the left of Ambartsumian’s Knot may be a particularly bright background galaxy.

Arp 105 is one of the brightest objects in the crowded galaxy cluster Abell 1185 in the constellation Ursa Major. Abell 1185, located around 400 million light-years away, is a chaotic cluster of at least 82 galaxies, many of which are interacting, as well as a number of wandering globular clusters that are not gravitationally attached to any particular galaxy. This Hubble image was taken as part of a study of the ongoing creation of galactic and intergalactic stellar populations in Abell 1185.